Elevator-car arrester with movable guide-strips.



No. 632,4l4. Patented Sept. 5, I899.

J. H. JOHNSON.

ELEVATOR CAR ARRESTER WITH MOVABLE GUIDE STRIPS.

(Applies- Hon filed Apr. 27, 1899.) (No Model.) 3 SheetsSheet I.

no: nouns ma; c'o. PMOTO-LITHO wAsumo-ron n c 9 9 B 5 p e S d e t n e ta P v N 0 s N H 0 J H I M '1 2 3 6 0 N ELEVATOR CAB ARRESTER WITHMOVABLE GUIDE STRIPS.

(Application filed Apr. 27, 1899.)

TNE norms pzrsns w. Puc'Po-u'mm WASNINGYON n. c.

Nu. 632,4l4.

Patented Sept. 5, I899. .1. H. JOHNSON. ELEVATOR G AR ARRESTEB WITHMOVABLE GUIDE STRIPS.

(Application filed Apr. 27, 1899.)

3 Sheets-Sheet 3,

(No Model.)

, VII/II (fa/yew Z01.

NITED STATES F TENT Grins JAMES H. JOHNSON, F NEWARK, NEW JERSEY,ASSIGNOR or ONE-HALF T0 WILLIAM R. WEEKS, or SAME PLACE.

ELEVATOR-CAR ARRESTER WITH M OV ABLE GUIDE-STRIPS.

SPECIFICATION forming part of Letters Patent No. 632,414, datedSeptember 5, 1899.

. Application filed April 27, 1899. Serial No. 714,668. (No model.)

To all whom it may concern: hoistway the guide-strip is preferablydivided Be it known that 1, JAMES H. JOHNSON, a into sections and allthesections moved outcitizen of the United States, residing at Newwardly at the bottom simultaneously when ark, county of Essex, Stateof New Jersey, the gearing is actuated.

have invented certain new and useful Im- The annexed drawings showdiagrams of a provements in Elevator-Car Arresters with construction inwhich the guide-strips are Movable Guide-Strips, fully described andforced outwardly by screws and the gearing represented in the followingspecification and consists of a shaft with bevel-wheels for actheaccompanying drawings, forming a part tuating such screws simultaneouslyand a 10 of the same. rope-drum connected to turn such shaft when Theobject of the present invention is to the safety-rope is pulled. furnishan effective means for arresting the Figure 1 is a plan of the hoistwayand car. movement of an elevator-car in case the sup- Fig. 2 is asection of the hoistway with the porting-rope should break or the carshould upper end of the car therein. Fig. 3 is a ver- 15 from any othercause be lowered at a danger tical elevation through the center of theous rate of speed. guide-post and the adjacent floor-beams, with The caris always guided by vertical strips the parts in section at the centerline where upon the sides of the hoistway, fitted to hatched. Fig. 4 isa vertical section on line notched shoes upon the body of the car, and ww in Fig. 3. Fig. 5 is an outside view of 20 such strips are generallyfastened to guidepart of the post and movable guide-strip at posts atopposite sides of the hoistway. In one of the actuating-nuts. Fig. 6 isa plan the present invention I make the guide-strip in section throughthe center of the nut f in upon one side of the hoistway movable andFig. 5, with the parts in section only where provide means for pressingthe strip or its hatched. Fig. 7 is an elevation of the hand- 2 5 lowerend outwardly into the hoistway, so as clamp and its actuating-leverviewed from to contract the space in which the shoes move the outer sideof the car, the car-body being and form an efficient brake to retard orarrest omitted and the rope and a part of the clampthe movement of thecar. The shoes upon the casing being broken away to show the concar aremade of suitable strength to resist struction. Fig. Sis aplan of thesame parts 0 the pressure, and the guide-strips are made with thecar-body in section. Fig. 9 is an in sections of suitable length andstrength to elevation of one of the screws and its atoperate as desired,and the guide-strip may be tached bevel-wheel. Fig. 10 is a sideelevapressed outwardly and supported at different. tion, and Fig. 11 afront elevation, of one of points by screws, wedges, or cams, and suchthe thrust-bearings.

35 agencies are connected by suitable gearing, The hoistway a is shownin Fig. 1 proso as to be actuated simultaneously or sucvided upon oneside with a fixed guide-strip cessively, as desired. The gearing foractuat-' s and upon the opposite side with a movable ing such agenciesis moved bya drum, around guide -strip 3, which is combined with a whicha rope is wound and extended to the strengthening-bare. .Theillustration shows 40 top of the hoistway and then over a pulley aconstruction of metallic beams, the post downward in the hoistway, sothat as it is being formed of two beams 17, secured to the clamped bythe car in its descent it may turn floor-beams d with an interspace orchannelthe drum and force the guide-stri p outwardly. waysufficient toreceive the bar 0. The beams Suchropeis for conveniencetermeda safety-I) and bar 0 are flanged, as usual, and nuts f 5 rope herein. A clamp togrip such rope may are shown attached to the bar 0 at intervals beactuated by a governor upon the car when to receive screws 6.Agear-shaft gis mounted the normal speed of the car is exceeded, or inthe rear of the nuts and connected with a' clamp may be actuated by ahand-lever the screws by bevel-wheels h and is supported within the car,or both may be provided to by bearings i and j. The bearings dot the 50afford additional security. In a very tall vertical shaft furnish alsobearings for the loo outer ends of the screws and are sustained againstthe thrust of the screws by projections from the floor-beams cl. A shaftis is also connected by bevel-wheels h with the.

vertical shaft and provided with drum m, from which the safety-rope n isled over pulleys 0 to and across the hoistway, so as to descend by theside of the car.

A car 1 is shown provided with shoes 2 to fit the guide-strips s s, andclamps for the safety-rope arev provided upon the top of the car andupon one side of the same to be actuated automatically or by hand. Aclampcasingp is shown secured upon the side of the car-body 1 with camsq pivoted therein and connected by segments 0 and arranged to clamp thesafety-rope 'n. .One of the segments is provided with an operating-crankt and with a hand-lever it within the car-body, so that the movement ofthe cam-lever may press the cams upon the safety-rope, and thus actuatethe gearing to throw out the guide-strip. A similar clamp, with crank 15and lever to, is shown upon the top of the car and so connected with agovernor U that an excessive speed of the governor will move the leverand cause the cams to grip the safetyrope. The governor-pulley w isshown actuated by a rope y, fixed at the top of the hoistway and carriedover the governor-pulley and over an idle pulley z upon the car andprovided at its lower end with a weight to produce a constant tension.The rope y is shown broken in Fig. 2, as the weight would in practicehang constantly at the bottom of the hoistway, because it does not riseand fall with the movement of the car; but the pulleys w and 5' (whichare both supported upon the car) simply roll over the rope as the carmoves up or down. The weight is shown in the drawings adjacent to theside of the car, but in practice is designed to hang below the pointwhich the car would reach in its movement. \Vith this construction anexcessive speed of the car induces an excessive speed of the governorand causes the clamp to grip the safety-rope n and throw the movableguide-strip out into the hoistway,where it crowds the car forciblyagainst the stationary guide-strip s and produces sufficient friction toretard or arrest the car.

In order to preserve the strength of the movable guide-strip in tallhoistways and to make it operative upon the car at various points in thehoistway, the gnide-stri p is preferably divided into sections, Fig. 3showing the bottom section of the guide-strip and a part of the sectionnext above. The lower guide-strip has the upper end of itsstrengthening-bare fixed at the top by the insertion of bolts .2 throughthe flanges of the bar 0 into the postbeams 19, which pivots theguide-strip, so that it may be pressed outwardly at the bottom withoutprotruding into the hoistway at the top. Two nuts are shown at the lowerend and at the middle, respectively, of the bar a and secured thereto bybolts 0, and braces or guards Z are shown attached to the post-beams bat the upper and lower side of the nuts f to support the nuts when adownward pressure is brought upon the guide-strips by their frictionalcontact with the car-shoes. The guidestrip, by its attachment to thenuts f, through the medium of the bar a and their support by the guardsZ, is firmly sustained against the vertical movement independently ofthe bolts 2. The dotted lines 3 in Fig. 3 show in an exaggerated degreethe outward movement of the guide-strip when the safety-rope is pulledand the gearing of the screws is actuated, and as the middle of suchstrip does not require to move out as far as the lower end the screw andnut at the middle of the strip would be formed of less pitch, so thatthe movements produced by the two screws would be proportionate to theirrespective distances from the bolt 2', upon which the guide-striphinges. Instead of making the screws with different pitch in such anarrangement of the guidestrip the cog-wheels connected with the screwsmay be made of different diameters, so as to rotate them in the desiredproportion. By moving all the sections of the guide-strip simultaneouslythe car would be retarded or arrested wherever it may be in thehoistway.

Any suitable means may be used to force the guide-strip outwardly, asthe essential feature of the invention consists of the guidestripmovable toward the car and means actuated by the car for moving theguide-strip outward into the hoistway to press upon the car-shoes, andthus retard or arrest the car.

The car may be provided alone with the hand-clamp or with the automaticgovernorclamp; but the combination of both, as shown in the drawings,furnishes the highest degree of security, and thus secures, especiallyin passenger-elevators, a degree of safety, which is more important thanany other consideration. It will be observed that the provision of thehand-clamp with actuating-lever inside of the car enables any passenger,as well as the conductor, to control its descent in case of accident.

With a construction of metallic beams, as illustrated in the drawings,the guide-post for the movable strip is readily formed with an openchannel-way in the front in which the guide-strip can be fitted; but ifa wooden construction is employed the same result maybe secured by usingtwo separate posts like the beams b or guiding the strip in its outwardmovement upon a single wooden post by any suitable means.

The strengthening-bar c is secured rigidly to the guide-strip, so thatit forms practically a part of the same, and it is obvious that theguide-strip may be made integral with such strengthening-bar or may beof any suitable dimensions to give it the requisite strength, and whereI have used the term guide-strip in the claims it is intended to includethe strengthening-bar or any other suitable means of giving it thenecessarystiifness to perform its functions.

Having thus set forth the nature of the invention, what is claimedherein is 1. In an elevator, a guide-strip movable toward the car andmeans controlled by the movement of the car for moving such guidestripto press upon the car-shoes.

2. In an elevator, a guide-strip fixed at the upper end and movable atthe lower end toward the car, and means controlled by the movement ofthe car for pressing the lower end of the strip against the car-shoes.

3. In an elevator, the combination,with the guide-post, of a guide-stripdivided into sections each fixed at the top and movable at the bottomtoward the car, and means controlled by the movement of the car forpressing the bottoms of the strips upon the carshoes, substantially asherein set forth.

at. In an elevator, the combination,with the elevator-post, of aguide-strip movable toward the car, a screw for pressing the bottom ofthe strip toward the car, and means controlled by the movement of thecar for rotatin g the screw, as and for the purpose set forth.

5. In an elevator, the combination,with the elevator-post, of aguide-strip movable toward the car, a series of screws for pressing thestrip toward the car, gearing controlled by the movement of the car forrotating the screws, and such gearing and the screw-threads proportionedto move the guide-strip obliquely with the bottom projected toward thecar, substantially as herein set forth.

6. In an elevator, the combination,with the elevator-post, of aguide-strip movable toward the car, a screw for pressing the lower endof the guide-strip toward the car, gearing actuated by a rope-drum forrotating the screw, a rope extended in the hoistway, and a clamp uponthe car adapted to grip the rope and rotate the drum and screw,substantially as herein set forth.

7. In an elevator, the combination, with the elevator-post, of aguide-strip movable toward the car, a screw for pressing the lower endof the guide-strip toward the car, a ropedrum and gearing -actuatedthereby for rotating the screw, a rope extended in the hoistway, agovernor upon the car, and a clamp actuated by the governor to grip thesaid rope when rotated abnormally, and thus rotate the drum and screw toarrest the car, substantially as herein set forth.

8. In an elevator, the combination, with the elevator-post, of aguide-strip movable toward the car, a screw for pressing the lower endof the guide-strip toward the car, a ropedrum and gearing actuatedthereby for rotating the screw, a rope extended in the hoistway, agovernor upon the car, and a clamp having connections to be actuated bythe governor to grip the said rope, and an additional clamp withhand-lever inside the car to be actuated directly by the operator,substantiall as herein set forth.

9. In an elevator, a guide-post having open channel-way in the front, aguide-strip fitted movably in such channel'way, and provided with aseries of threaded nuts, screws fitted to such nuts and provided withthrust-bearings, and gearing controlled by the movement of the car torotate such screws to press the guide-strip upon the car-shoes,substantially as herein set forth.

10. In an elevator, a guide-post having open channel-way in the front, aguide-strip fitted movably in such channel-way, and provided with aseries of threaded nuts, screws fitted to such nuts and provided withthrust-bearings and bevel-gears, a rotary shaft with cogwheels to drivesuch gears, a rope-drum connected with such shaft with a rope extendedthrough such hoistway, and a clamp upon the car to grip such rope androtate the drum and screws, substantially as herein set forth.

11. In an elevator, a guide-post having open channel-way in the front, aguide-strip secured at its upper end in such channel-way, and movableoutwardly at its lower end,'and means controlled by the movement of thecar for pressing the lower end of the stripoutwardly into the hoistway.

12. In an elevator, a guide-post having open channel-way in the front, aguide-strip divided into sections with each section secured at its upperend in such channel-way, and movable outwardly at its lower end, gearingfor moving the lower ends of the guide-strips outwardly into thehoistway simultaneously, and means upon the car for actuating suchgearing, substantially as herein set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JAMES H. JOHNSON.

lVitnesses:

L. LEE, THOMAS S. CRANE.

